1.创建验证码模块

#!/usr/bin/env python# -*- coding:utf-8 -*-import randomfrom PIL import Image, ImageDraw, ImageFont, ImageFilter_letter_cases = "abcdefghjkmnpqrstuvwxy"  # 小写字母，去除可能干扰的i，l，o，z_upper_cases = _letter_cases.upper()  # 大写字母_numbers = ''.join(map(str, range(3, 10)))  # 数字init_chars = ''.join((_letter_cases, _upper_cases, _numbers))def create_validate_code(size=(120, 30),                         chars=init_chars,                         img_type="GIF",                         mode="RGB",                         bg_color=(255, 255, 255),                         fg_color=(0, 0, 255),                         font_size=18,                         font_type="Monaco.ttf",                         length=4,                         draw_lines=True,                         n_line=(1, 2),                         draw_points=True,                         point_chance=2):    """    @todo: 生成验证码图片    @param size: 图片的大小，格式（宽，高），默认为(120, 30)    @param chars: 允许的字符集合，格式字符串    @param img_type: 图片保存的格式，默认为GIF，可选的为GIF，JPEG，TIFF，PNG    @param mode: 图片模式，默认为RGB    @param bg_color: 背景颜色，默认为白色    @param fg_color: 前景色，验证码字符颜色，默认为蓝色#0000FF    @param font_size: 验证码字体大小    @param font_type: 验证码字体，默认为 ae_AlArabiya.ttf    @param length: 验证码字符个数    @param draw_lines: 是否划干扰线    @param n_lines: 干扰线的条数范围，格式元组，默认为(1, 2)，只有draw_lines为True时有效    @param draw_points: 是否画干扰点    @param point_chance: 干扰点出现的概率，大小范围[0, 100]    @return: [0]: PIL Image实例    @return: [1]: 验证码图片中的字符串    """    width, height = size  # 宽高    # 创建图形    img = Image.new(mode, size, bg_color)    draw = ImageDraw.Draw(img)  # 创建画笔    def get_chars():        """生成给定长度的字符串，返回列表格式"""        return random.sample(chars, length)    def create_lines():        """绘制干扰线"""        line_num = random.randint(*n_line)  # 干扰线条数        for i in range(line_num):            # 起始点            begin = (random.randint(0, size[0]), random.randint(0, size[1]))            # 结束点            end = (random.randint(0, size[0]), random.randint(0, size[1]))            draw.line([begin, end], fill=(0, 0, 0))    def create_points():        """绘制干扰点"""        chance = min(100, max(0, int(point_chance)))  # 大小限制在[0, 100]        for w in range(width):            for h in range(height):                tmp = random.randint(0, 100)                if tmp > 100 - chance:                    draw.point((w, h), fill=(0, 0, 0))    def create_strs():        """绘制验证码字符"""        c_chars = get_chars()        strs = ' %s ' % ' '.join(c_chars)  # 每个字符前后以空格隔开        font = ImageFont.truetype(font_type, font_size)        font_width, font_height = font.getsize(strs)        draw.text(((width - font_width) / 3, (height - font_height) / 3),                  strs, font=font, fill=fg_color)        return ''.join(c_chars)    if draw_lines:        create_lines()    if draw_points:        create_points()    strs = create_strs()    # 图形扭曲参数    params = [1 - float(random.randint(1, 2)) / 100,              0,              0,              0,              1 - float(random.randint(1, 10)) / 100,              float(random.randint(1, 2)) / 500,              0.001,              float(random.randint(1, 2)) / 500              ]    img = img.transform(size, Image.PERSPECTIVE, params)  # 创建扭曲    img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)  # 滤镜，边界加强（阈值更大）    return img, strs

2.前端

    
                  
      
        
       
            
        
            
        
            
        
            
        
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3.views函数

from django.shortcuts import render, HttpResponse# Create your views here.from app01 import modelsfrom io import BytesIOfrom .check_code import create_validate_codedef login(request):    if request.method == "POST":        code = request.POST.get('check_code')        if code.upper() == request.session['CheckCode'].upper():            print('验证码正确')        else:            print('验证码错误')    return render(request, 'login.html')def check_code(request):    """    验证码    :param request:    :return:    """    # stream = BytesIO()    # img, code = create_validate_code()    # img.save(stream, 'PNG')    # request.session['CheckCode'] = code    # return HttpResponse(stream.getvalue())    # data = open('static/imgs/avatar/20130809170025.png','rb').read()    # return HttpResponse(data)    # 1. 创建一张图片 pip3 install Pillow    # 2. 在图片中写入随机字符串    # obj = object()    # 3. 将图片写入到制定文件    # 4. 打开制定目录文件，读取内容    # 5. HttpResponse(data)    stream = BytesIO()    img, code = create_validate_code()    img.save(stream,'PNG')    request.session['CheckCode'] = code    return HttpResponse(stream.getvalue())

4.url路由

urlpatterns = [    path('login/', views.login),    path('check_code.html', views.check_code),]